Hybrid Multiple Access for Uplink OFDMA System
نویسندگان
چکیده
منابع مشابه
Hybrid Multiple Access for Uplink OFDMA System
We propose a hybrid multiple access (HMA) for uplink orthogonal frequency division multiple access (OFDMA) systems, which combines two resource sharing schemes: a scheduling-based resource allocation (SBRA) scheme and a contentionbased resource allocation (CBRA) scheme. The SBRA scheme is appropriate for non-real time high data rate traffic, and, CBRA is appropriate for near-real time low/mediu...
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In this paper, we consider the frequency offset estimation for Orthogonal Frequency-Division Multiple Access (OFDMA) uplink (UL) transmissions. We first analyze the negative effect of Multi-Access-Interference (MAI) on OFDMA UL, and then propose two interference reduction/elimination methods, i.e., the Reduced-Rank-Projector (RRP) and Shift-Sampling-Projector (SSP) methods, to eliminate/reduce ...
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In the uplink of OFDMA-based systems, Multiple Access Interference (MAI), caused by synchronization offsets, can cause considerable degradation in the performance of the User Terminals (UTs). The conventional approach to deal with MAI is based on the usage of Cyclic Prefix (CP) also known as Guard Intervals (GI) in time domain. The time and frequency offsets of UTs signals arriving at BS are es...
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ژورنال
عنوان ژورنال: Journal of information and communication convergence engineering
سال: 2012
ISSN: 2234-8255
DOI: 10.6109/jicce.2012.10.2.117